Field parameters (dissolved oxygen, pH, specific conductance, and water temperature) in ground water

DESCRIPTION OF CONTENTS OF FILE GW1FIELD.DAT


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| DATA FILE FORMAT |
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columns  1-15  Station ID number
columns 21-26  Date (YYMMDD format)
columns 31-34  Time
columns 41-49  Water level (Storet code 72019, feet below land surface)
column  51     Remark for water temperature
columns 52-59  Water temperature (Storet code 00010, in degrees Celsius)
column  61     Remark for specific conductance
columns 62-69  Specific conductance (Storet code 00095, in microsiemans per
                  square centimeter at 25 degrees Celsius)
column  71     Remark for dissolved oxygen
columns 72-79  Dissolved oxygen (Storet code 00300, in milligrams per liter)
column  81     Remark for pH
columns 82-89  pH (Storet code 00400, in standard units)


NOTES: A < symbol in the remarks field indicates the parameter or
       constituent is less than the value reported.


       An E in the remarks field indicates the concentration given is
       estimated.


       Water levels or concentrations less than zero (for example -999.999)
       indicate no data are available for that observation.




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| STATION INFORMATION |
-----------------------


Data are available for 94 wells.  Data were collected between June 1994 and
August 1995.  Well location, depth, and screened interval information may be
obtained by retrieving the file 'gw1sta.txt'.




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| METHODS          |
--------------------


Measurements were made in a chamber attached to the pump tubing using a Hydrolab
multiparameter meter using the methods of Koterba and others (1995).




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| REFERENCES       |
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Koterba, M.T., Wilde, F.D., and Lapham, W.W., 1995, Ground-water data-collection
protocols and procedures for the National Water-Quality Assessment Program:
Collection and documentation of water-quality samples and related data: U.S.
Geological Survey Open-File Report 95-399, 113 p.